TPS63020 Buck-Boost Flashlight Driver 17mm Mk 1.2
author: schizobovine
4 layer board of 0.67 x 0.67 inches (17.0 x 17.0 mm)
Uploaded:
January 20, 2019
Shared:
January 20, 2019
Total Price:
$4.40
TPS63020 based buck-boost LED driver in 17mm / 4 layers, with 1.27mm ISP pogo header on bottom side for in-flashlight programming.
Bill of Materials (BOM)
U1 TPS63020DSJR
U2 ATTINY13A-MMU
U3 INA190A1IRSWR [1]
U4 TLV70025DCKR [2]
C1 100nF 0402
C2 22uF 16V 0805
C3 1uF 0402
C4 47uF 25V 1206
C5 1nF 0402
C6 1uF 0402
C7 1uF 0402
R2 13mOhm 1206 [3]
R3 6.8K 0402
R4 4.7K 0402
R5 19.1K 0402
1) Make sure to get the A1 version, as others have different gain which changes the power output.
2) Any 2-3V LDO should do.
3) Current sense resistor, 13mOhm is for about 1.5A out.
Rsense = 0.5V / (Iout * gain) = 0.5V / (Iout * 25)
| Iout (mA) | Rsense (mOhm) |
|---|---|
| 1000 | 20 |
| 1500 | 13 |
| 2000 | 10 |
TPS63020 based buck-boost LED driver in 17mm / 4 layers, with 1.27mm ISP pogo header on bottom side for in-flashlight programming.
Bill of Materials (BOM)
U1 TPS63020DSJR
U2 ATTINY13A-MMU
U3 INA190A1IRSWR [1]
U4 TLV70025DCKR [2]
C1 100nF 0402
C2 22uF 16V 0805
C3 1uF 0402
C4 47uF 25V 1206
C5 1nF 0402
C6 1uF 0402
C7 1uF 0402
R2 13mOhm 1206 [3]
R3 6.8K 0402
R4 4.7K 0402
R5 19.1K 0402
1) Make sure to get the A1 version, as others have different gain which changes the power output.
2) Any 2-3V LDO should do.
3) Current sense resistor, 13mOhm is for about 1.5A out.
Rsense = 0.5V / (Iout * gain) = 0.5V / (Iout * 25)
| Iout (mA) | Rsense (mOhm) |
|---|---|
| 1000 | 20 |
| 1500 | 13 |
| 2000 | 10 |
